Machine for making corrugated paper board



Oct. 22, 1935. e. w. SWIFT. JR 7 3 MACHINE FOR MAKING CORRUGATED PAPERBOARD Filed Dec. 20, 1953 INVENTOR Patented Oct. 22, 1935 UNITED STATESPATENT OFFICE MACHINE FOR MAKING connucs'rnn PAPER pomp ApplicationDecember 20, 1938, Serial No. 703,278

8 Claims.

The present invention relates more especially to that type oi.corrugated paper board machine in which a continuous liner web iscontinuously applied to thesilicated tips of a corrugated web as thelatter is passed around one of the corrugating rolls which cooperate inthe production of the corrugated web. It has been customary heretoforeto construct the silicate or adhesive applying rolls in machines of thischaracter with peripheral grooves arranged, say, from three to fourinches apart along the axis of the silicate roll and to arrange fixedfingers, guides or strippers to extend through said grooves, said guidefingers or strippers being suitably shaped to conform to the peripheryof the corrugated roll for retaining the corrugated web in mesh with thecorrugated roll. Machines of this character have been subject to certaindrawbacks due to the guide fingers becoming gummed-up by the sillcatewhich furthermore runs down the guides and drops onto the paper below.Another drawback to a machine of this character resides in the fact thatthe arcuate edges of the guides in pressing against the tips of thecorrugated web for holding the corrugations of the web in mesh with thecorrugated roll, keep the silicate adhesive from being applied toperipheral series of bald tips arranged in circular streaks of an inchwide and three to four inches apart. As a result, there will be no bondbetween the corrugated and liner webs at these points and in the eventthat the creases formed in a blank during the manufacture of a boxhappen to be located near these bald streaks, the tendency is to produceboxes of inferior quality.

The primary purpose of my invention is to overcome the above drawbacksby an improved construction and arrangement oi! parts in a machine ofthis character whereby pressure may be applied to the corrugated web bymeans of a suitable fluid pressure medium such, for example, ascompressed air (preferably in a heated condition), dry steam, or otherheated fluid which, by being directed against the corrugated web as itmoves around the corrugating roll, operates to hold the web in meshtherewith without the use of finger guides. In this way, the t ps of thecorrugated web may be left uncovered throughout the width of the web sothat by applying'continuous bands of adhesive to said tips from one sideof the corrugated web to the other, there will be no loose points in theseal between the corrugated web and its-liner. It will be understoodfurthermore that by using pressure fluids which are heated suflicientlyto avoid cooling ofl the web-corrugating rolls, the latters function oi.impressing the corrugations in the web, may be carried on withoutlessening their effectiveness as irons which tend to set the webpermanently in its corrugated form.

Further and more particular objects of my invention will appear in thespecification, pecu-, liar features in the construction and arrangementof certain parts being recited in the claims and shown on theaccompanying drawingwhich illustrates an adaptation of my invention in apreferred embodiment.

In the drawing.

Figure l is a diagrammatic vertical longitudinal section or the mainessential portions of a machine of this character showing an adaptationof my invention thereto.

Figure 2 is a modified detail shown partly in transverse section andpartly in side elevation.

Referring more particularly to the drawing, 2 my invention is shown inan adaptation to a corrugated paper board machine in which a web I issupplied in a horizontal plane in which an upper corrugating roll 2cooperates with a lower corrugating roll 3. As said web passes betweenthe corrugated rolls 2 and 3, it becomes corrugated and is passed aroundthe periphery of the lower corrugated roll 3 with its corrugationsmaintained in mesh with the corrugations of said roll. For this purpose,as indicated in Figure 1 of the drawing, the upper corrugated roll 2 isprovided with a plurality of axially spaced peripheral grooves having acommon depth indicated by the broken line 2 to accommodate therearwardly presented stripper fingers 4 which project into said grooves,said fingers forming integral portions of a series of laterally spacedplates 4 which are provided with arcuate edges 4 conforming to theperiphery of lower corrugated roll 3 for guiding the corrugated webdownwardly while maintaining the corrugations oi the web in closejuxtaposition with the corrugations of the roll 3. An adhesive orsilicate roll 5 is suitably arranged to bear peripherally against thecrowns or tips of the corrugated web as they successively pass thecommon plane of the rotary axes of the lower corrugating roll 3 andadhesive applying roll 5. The adhesive roll 5 is arranged to rotate inan adhesive trough 6 and is provided with an unbroken peripheral surfacefor applying adhesive to the tips or crowns of the corrugated webwithout any bare spots from one edge to the other or the corrugated web.To avoid summing-up the laterally spaced guide plates 4, said platesterminate above the common axial plane of the rolls 3 and 5 and 55 arespaced from the adhesive roll along their edges which lie contiguous tosaid adhesive roll. A squeegee roll 6 operates peripherally on the roll5 for preventing an excessive supply of adhesive reaching the corrugatedweb. In the form of corrugated paper board machine shown in Figure 1 oithe drawing, the corrugated web 1 moves downwardly around the corrugatedroll I til it reaches a vertical plane common to the rotary axes of saidcorrugated roll and a pressure roll I over which a liner web I is movingcontinuously, said pressure roll being arranged to press the liner webinto engagement with the moist tips of the corrugated web after whichthe single faced corrugated board passes around the pressure roll I andto any desired point. In order to avoid the drawbacks discussed above inmachines of this character as usually constructed, the presentapplication contemplates the avoidance of the usual guides or plateswhich extend between the adhesive applying line and the liner applyingline for slidably engaging the corrugated web and maintaining it in meshwith the corrugated roll. For this purpose,my present inventioncontemplates the application of pressure by means of a fluid pressuremedium such as heated compressed air, dry steam or other heated fluidswhereby it becomes possible to maintain the corrugated web in properposition on the corrugated roll without the use of slidably contactingguide plates which become gummed-up with adhesive and at the same timetoovercome the necessity for peripherally grooving the silicate roll andto prevent the rormation'cofbald streaks leading to the production ofboxes, etc. of inferior quality. As an illustration of suitable meansfor carrying out this purpose, I have shown in Figure 1 of the drawing apipe or conveyor 9 for compressed air or steam from which at spacedintervals throughout the length of the corrugated roll 3, pipes i0 leadoff to one or more fluid pressure boxes H. In each of the pipes ill, ahand valve I2 is arranged for. regulating the pressure in the chamber orchambers iii of the fluid pressure box or boxes. For the purpose ofmaintaining the corrugated web in position on the corrugated roll 3, thefluid pressure box H is constructed with an arcuate front wall I 4 inclose juxtaposition to, but spaced from, the corrugated web I and saidarcuate wall is provided with suitably spaced outlets or openings ii formaintaining a uniformly distributed pressure on the corrugated web forholding it in position during its movement from the adhesive roll to theliner applying pressure roll. As a modified form of the fluid pressuresystem I have shown in Figure 2 of the drawing a pressure main orconveyor IS with radial pipes ll leading therefrom to suitably bentpipes l1 provided with discharge outlets l8, suitable hand valves isbeing provided for the proper pressure control.

I claim:--

1. In a corrugated paper board machine, the combination of a corrugatedroll rotatable about an axis and constructed to mesh with a continuouscorrugated web for conveying said web past an adhesive roll to aliner-applying roll, an adhesive roll arranged to apply adhesive to theoutwardly presented tips of said corrugated web as said web is conveyedthereby around the rotary axis of said corrugated roll, a liner-applyingroll cooperating with said corrugated roll at a peripherally spaceddistance from said adhesive roll for applying a liner web to saidcorrugated web, said liner-applying roll being constructed and arrangedto guide a continuous liner web into engagement with theadhesive-bearing tips of the corrugated web and to convey the liner webwith corrugated web attached thereto away from said corrugated roll, anda receiver for compressed air, having an arcuate wall conforming to andpresented in close juxtaposition to the corrugated roll between saidadhesive roll and said liner-applying roll, said arcuate wall beingprovided with compressed air discharge outlets. 2. In a corrugated paperboard machine, th combination of a pair of cooperating paper-corrugatingrolls, an adhesive roll cooperatively arranged with respect to one ofsaid corrugating rolls for applying adhesive to the outwardly presentedtips of a corrugated web as said web is conveyed by and moving with thelast-mentioned corrugating roll, a liner-applying roll cooperating withsaid last-mentioned corrugating roll at a peripherally spaced distancefrom said adhesive roll for applying a liner web to said corrugatedweb,and a receiver for compressed air, said compressed air receiverbeing provided with discharge outlets presented inwardly in closejuxtaposition to the last-mentioned corrugating roll between saidadhesive roll and said liner-applying roll for retainingsaid corrugatedweb in mesh with said corrugated roll.

3. In a corrugated paper board machine, the combination of cooperatingpaper corrugating rolls which are constructed and arranged to formcorrugations in a continuous web as it passes between said rolls, asmooth-surfaced roll cooperating with one of said corrugating rolls forapplying a liner web to said corrugated web, an adhesive rollintermediately arranged with respect to the other of said corrugatingrolls and said smooth-surfaced roll for applying adhesive to theoutwardly presented tips of a corrugated web conveyed by and moving withsaid one of the corrugating rolls, and a compressed air receiver havingan arcuate wall conforming to and spaced from the path of theadhesive-bearing tips of the corrugated web between said adhesive andsmooth-surfaced rolls, said arcuate wall being provided with dischargeoutlets for projecting jets 46 of compressed air against said corrugatedweb.

4. In a corrugated paper board machine, the combination with a pair orpaper corrugating rolls which are constructed and arranged to formcorrugations in a continuous web as it passes between said rolls, aliner-applying roll cooperating with one of the paper-corrugating rollsin the common axial plane of said corrugating rolls, an adhesive rollcooperating with said lower corrugating roll intermediately with respectto the other corrugating roll and said liner-applying roll, saidadhesive roll being arranged to operate on the outwardly presented tipsof said corrugated web while it moves in mesh with said lowercorrugating roll. a compressed air main arranged parallel to the notaryaxis of said lower corrugating roll and intermediately with respect tosaid adhesive and liner-applying rolls, and a wind box mounted on andconnected to said compressed air main, said wind box having an arcuatewall conforming to and spaced from the tips of the corrugated webpassing between said adhesive and liner-applying rolls, said arcuatewall of the wind box being provided with air outlets spaced axially andperipherally with respect to the lower corrugating roll.

5. In a corrugated paper board machine, the combination of twocooperating paper corrugating rolls, a pressure roll rotatably engagingone is conveyed past said adhesive roll enmeshed.

ripherally from the other corrugating roll, a silicate roll arrangedintermediately with respect to said other corrugating roll and saidpressure roll for applying silicate to the crowns of the corrugatedpaper moving around said one of the paper corrugating rolls, and aseries of axially spaced compressed air receivers interposed betweensaid silicate and pressure rolls, each of said compressed air receiversbeing provided with an arcuate series of discharge outlets conformablyarranged with respect to the last-mentioned paper corrugating roll.

6. In a corrugated paper board machine, the combination with acorrugated roll rotatable about an axis for conveying a continuouscorrugated web which is enmeshed therewith to a position where saidcorrugated web is separated from the corrugated roll, and a receiver forfluid pressure medium extending exteriorly to and around a, portion ofthe periphery of said corrugated roll with which the corrugated web isenmeshed, said receiver being constructed to project a current of fluidpressure medium against the corrugated web for retaining it in closerelation to said corrugated roll as it approaches said position wherethe web is separated from the corrugated roll.

7. In a corrugated paper board machine, the combination with acorrugated roll rotatable about an axis for conveying a continuouscorrugated web past an adhesive roll and into posi-- tion to have aliner web applied thereto. an adhesive roll arranged to operate on theoutwardly presented tips of said corrugated web as said web with saidcorrugated roll, a pressure roll arranged to cooperate with saidcorrugated roll at said position, and a receiver for fluid pressuremedium arranged exteriorily to said corrugated roll and intermediatelywith respect to said adhesive roll and said pressure roll, said receiverbeing constructed to project a current of fluid pressure medium againstthe corrugated web for retaining a it in mesh with said corrugated rollwhile said corrugated web is moving over the space between said adhesiveroll and said pressure roll.

8. In a corrugated paper board machine, the

combination with a corrugated r011 rotatable about an axis for conveyinga continuous corrugated web past an adhesive roll and into positicn tohave a liner web applied thereto, an adhesive r011 arranged to operateon the outwardly presented tips of said corrugated web as said web isconveyed past said adhesive roll enmeshed with said corrugated roll, apressure roll arranged to cooperate with said corrugated roll at saidposition, a receiver for fluid pressure medium arranged exteriorly tosaid corrugated roll, said receiver being provided with a dischargeoutlet wall extending approximately from said adhesive roll to saidpressure roll around the periphery of said corrugated roll forprojecting fluid pressure medium against the corrugated web forretaining it in mesh with said corrugated roll. and means torcontinuously supplying said receiver with fluid pressure medium.

GEORGE W. SWIFT. J 3.

